Given the IaaS cloud service model, at which of the following layers of the platform does microsegmentation BEST apply?

A customer is building a web cluster in which all nodes must access a shared pool of images.
Which of the following storage types would be BEST for this workload?

Which of the following solutions BEST complies with laws requiring secure data-at-rest for a critical application while keeping in mind the need for reduced costs?

Which of the following technologies allows for the secure exchange of encryption keys within an internal network?

An administrator is creating new severs in a public cloud. The workflow creates and application group with three VMs, one web server, one application server and one database server. The three VMs are all accessible via SSH, but the websites shows a 503-error referring to a database issue.
Which of the following is the MOST likely cause of the error?